Experimental Identification of the Transmittance Matrix for Any Element of the Pulsating Gas Manifold

Cyklis, Piotr

doi:10.1006/jsvi.2000.3531

Cited by 14 publications

(8 citation statements)

References 5 publications

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“…A positive-displacement compressor produces pressure pulsations due to their cyclic operation. The analysis of pressure pulsations in the exhaust pipe is important for various reasons: they directly affect the quantity of energy required for medium compression due to dynamic pressure charging, or inversely, dynamic suppression of suction and discharge processes; they cause mechanical vibrations of a compressed gas piping network; they cause aerodynamic and mechanical noise; they affect the dynamics of working valves in valve compressors, and they intensify the process of heat convection in heat convection in the heat exchangers in the gas network [3]. Other researches about the presence of fluctuating pressure and its effect have been published [4] and [5].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis on various models of pressure snubbers in the hydrogen gas compressing system

et al. 2008

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This paper explains about numerical modeling of gas flow passing through a snubber, pulsation damper, in a hydrogen gas compressor system. The verification of the preliminary model was done successfully by comparing it with experimental results. Numerical analysis for various snubber dimensions is the focus of this present study. Thirty models of snubber were created by varying snubber height and buffer angle, and then simulated with the real working condition of a hydrogen gas compressing system. The CFD code package used was a Star CD with transient analysis and k-/ high Reynolds number as the turbulence model. The study was done by comparing pressure loss and pressure pulsation, since these two parameters are the objective functions in snubber optimization. The best snubber is the one that has the minimum pressure loss and pressure pulsation. Numerical result shows that the pressure loss grows with the increment of snubber volume. To the contrary, however, the pressure pulsation is decreased. Determining the buffer angle as the adjusted variable, the minimum pressure loss occurred at 30 o . But pressure pulsation trend was escalating.

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Section: Introductionmentioning

confidence: 99%

Numerical analysis on various models of pressure snubbers in the hydrogen gas compressing system

et al. 2008

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“…In case of a manifold element there are two physical phenomena: pressure and flow pulsations which may be used in calculation as excitation or response. There are two ways to calculate transmittances: experimental [2] or theoretical based on the CFD simulation [3]. The concept of the method is as follows: for a considered element of a manifold a full multi-dimensional CFD non-linear simulation is carried out, solving the Navier-Stokes set of equations numerically together with the necessary closing models, i.e.…”

Section: Vestigated Muffling Elementsmentioning

confidence: 99%

“…Various numerical methods used for calculating transmission loss in pipelines, mufflers and silencer systems are described in different studies. In [2,7] comparison of experimental result and Helmholtz model results of pressure pulsations in existing installations are discussed. The author [2] shows that the error of conventional Helmholtz method may in some cases reach 90% and after introducing a new transmittance matrix method significant improvements have been achieved.…”

Section: Introductionmentioning

confidence: 99%

“…In [2,7] comparison of experimental result and Helmholtz model results of pressure pulsations in existing installations are discussed. The author [2] shows that the error of conventional Helmholtz method may in some cases reach 90% and after introducing a new transmittance matrix method significant improvements have been achieved. The same method has been applied by the authors [3,5,6] to model and analyse different acoustic systems.…”

Section: Introductionmentioning

confidence: 99%

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Passive pressure pulsation damping using shaped nozzles

Cyklis

Młynarczyk

2014

ZN PRz Mechanika

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Pressure pulsations in intake and outlet systems of positive-displacement compressors are one of the most important problems in compressed gas pipelines. This problem occurs not only in huge compressed systems, such as the natural gas piping in gas mines or national gas transport systems, but also in small refrigeration compressors in domestic applications. Nowadays systems require new approach since in all applications the variable rotational speed compressors are introduced. The mufflers designed in a conventional way on the basis of the Helmholtz theory are effective only for specific frequency range. In case of variable rotational speed the reaction of such damper may be insufficient. Therefore, any innovative ideas for pressure pulsating damping are welcomed by the compressor industry. One of the possible solutions to attenuate pressure pulsation over a wide range of frequencies is the introduction of shaped nozzles just after the compressor outlet chamber. It is obvious that the nozzle attenuates pressure pulsation, but simultaneously the requirement for the driving power of the compressor rises. The main subject of this paper is to show that using properly shaped nozzles one can achieve pressure pulsation damping, with insignificant influence on the compressor power consumption. The results of experimental investigations and some results of CFD analyses are shown in the paper, with indication for the best construction of the nozzle shape.

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“…The most common methods of modelling pressure pulsation in large pipeline systems are based on the acoustic plane wave theory in time-domain and frequency-domain. The application of the latter method for reciprocating compressors was described by (Cyklis 2001, Soedel 2007and Zhou et al, 2001. Based on the results of simulations performed as part of the research here presented, it is possible to attenuate the system by introducing orifices or pulsation vessels and dampers.…”

Section: Introductionmentioning

confidence: 99%

Modelling of pressure pulsation in gas compressor station

2018

Engineering Mechanics

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The paper presents a mathematical model for evaluating pressure pulsation propagation of gas in a pipeline system. The calculations were performed for a natural gas compressor station, in which pressure pulsation was excited by a double-cylinder reciprocating compressor. The mathematical model was based on the acoustic plane wave theory and solved in the frequency domain. The simulation results were compared with experimental test measurements of dynamic pressure changes in the gas installation.

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Experimental Identification of the Transmittance Matrix for Any Element of the Pulsating Gas Manifold

Cited by 14 publications

References 5 publications

Numerical analysis on various models of pressure snubbers in the hydrogen gas compressing system

Numerical analysis on various models of pressure snubbers in the hydrogen gas compressing system

Passive pressure pulsation damping using shaped nozzles

Modelling of pressure pulsation in gas compressor station

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